scholarly journals Theoretical Study on Asymmetric Anionic Polymerization Mechanism of N-Substituted Maleimide with Li Complex

2002 ◽  
Vol 3 ◽  
pp. 107-116 ◽  
Author(s):  
Hidetoshi Ono
Keyword(s):  
Anionic Polymerization ◽  
Theoretical Study ◽  
Polymerization Mechanism

Theoretical Study of Polymerization Mechanism ofp-Xylylene Based Polymers

2010 ◽  
Vol 114 (12) ◽  
pp. 4296-4303 ◽  
Author(s):  
Krzysztof Smalara ◽  
Artur Giełdoń ◽  
Maciej Bobrowski ◽  
Jarosław Rybicki ◽  
Cezary Czaplewski
Keyword(s):  
Theoretical Study ◽  
Polymerization Mechanism

A New Living Emulsion Polymerization Mechanism:  Episulfide Anionic Polymerization

2002 ◽  
Vol 35 (23) ◽  
pp. 8688-8693 ◽  
Author(s):  
A. Rehor ◽  
N. Tirelli ◽  
J. A. Hubbell
Keyword(s):  
Emulsion Polymerization ◽  
Anionic Polymerization ◽  
Polymerization Mechanism

A Theoretical Study of Silanol Polymerization

1986 ◽  
Vol 73 ◽  
Author(s):  
Larry W. Burggraf ◽  
Larry P. Davis
Keyword(s):  
Complex Systems ◽  
Molecular Orbital ◽  
Anionic Polymerization ◽  
Theoretical Study ◽  
State Of The Art ◽  
Activation Barrier ◽  
Polymerization Process ◽  
Nucleophilic Attack ◽  
Semi Empirical ◽  
Coordinate Structures

ABSTRACTWe have applied state-of-the-art semi-empirical molecular orbital methods to a study of the anionic polymerization of silanols to form silica. In particular, we have considered nucleophilic attack on silanols and subsequent reactions of the products. Hydroxide addition proceeds without activation to form five-coordinate silicate anions. Five-coordinate structures can also be formed by oligomerization following the attack of hydroxide on neutral silanols to abstract a proton. These five-coordinate structures are predicted to play a key role as intermediates in the polymerization process. Water can be eliminated from these anions, but with a substantial activation barrier. The activation barrier appears to be lower for the larger, more complex systems. These predictions are consistent with a rapid pre-equilibrium to form dimer anions followed by the slower reaction to form higher oligomers.

Anionic polymerization of .beta.-lactones initiated with alkali-metal alkoxides: reinvestigation of the polymerization mechanism

1992 ◽  
Vol 25 (7) ◽  
pp. 2017-2020 ◽  
Author(s):  
Piotr Kurcok ◽  
Marek Kowalczuk ◽  
Krystian Hennek ◽  
Zbigniew Jedlinski
Keyword(s):  
Alkali Metal ◽  
Anionic Polymerization ◽  
Metal Alkoxides ◽  
Polymerization Mechanism
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